A Method for Measuring Contact Angle and the Influence of Surface-Fluid Parameters on the Boiling Heat Transfer Performance

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorFed Univ Technol Akure FUTA-
Autor(es): dc.creatorCunha, Alex P. da [UNESP]-
Autor(es): dc.creatorMogaji, Taye S.-
Autor(es): dc.creatorSouza, Reinaldo R. de [UNESP]-
Autor(es): dc.creatorCardoso, Elaine M. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:06:21Z-
Data de disponibilização: dc.date.available2022-02-22T00:06:21Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1115/1.4047057-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195625-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195625-
Descrição: dc.descriptionAn experimental apparatus and a computational routine were developed and implemented in order to obtain the sessile drop images and the contact angle measurement for different fluids and surface conditions. Moreover, experimental results of heat transfer coefficients (HTCs) during pool boiling of de-ionized water (DI water), Al2O3-DI water- and Fe2O3-DI water-based nanofluids are presented in this paper. Based on these results, the effect of surface roughness and nanofluid concentration on the surface wettability, contact angle, and the heat transfer coefficient was analyzed. The experiments were performed on copper heating surfaces with different roughness values (corresponding to a smooth surface or a rough surface). The coated surfaces were produced by the nanofluid pool boiling process at two different volumetric concentrations. All surfaces were subjected to metallographic, wettability and roughness tests. For smooth surfaces, in comparison to DI water, heat transfer enhancement up to 60% is observed for both nanofluids at low concentrations. As the concentration of the nanofluid increases, the surface roughness increases and the contact angle decreases, characterizing a hydrophilic behavior. The analyses indicate that the boiling process of nanofluid leads to the deposition of a coating layer on the surface, which influences the heat transfer performance in two-phase systems.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Sch Nat Sci & Engn, Av Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionFed Univ Technol Akure FUTA, Sch Engn & Engn Technol, Dept Mech Engn, PMB 704, Akure, Ondo State, Nigeria-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Sch Nat Sci & Engn, Av Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionCNPq: 458702/2014-5-
Descrição: dc.descriptionFAPESP: 2013/15431-7-
Descrição: dc.descriptionFAPESP: 2017/13813-0-
Descrição: dc.descriptionFAPESP: 2019/02566-8-
Formato: dc.format10-
Idioma: dc.languageen-
Publicador: dc.publisherAsme-
Relação: dc.relationJournal Of Heat Transfer-transactions Of The Asme-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectpool boiling-
Palavras-chave: dc.subjectnanofluid-
Palavras-chave: dc.subjectcontact angle measurement-
Palavras-chave: dc.subjectroughness-
Palavras-chave: dc.subjectwetted area-
Palavras-chave: dc.subjectheat transfer-
Título: dc.titleA Method for Measuring Contact Angle and the Influence of Surface-Fluid Parameters on the Boiling Heat Transfer Performance-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.